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guard cell — guard′ cell n. bot either of a pair of crescent shaped cells that flank each plant pore and control its opening and closing by means of turgidity … From formal English to slang

guard cell — n. either of the two bean shaped cells which surround and control a stoma, or air pore, in the epidermis of a plant … English World dictionary

guard cell — noun : one of the two crescent shaped epidermal cells united at their ends whose changes in turgidity determine opening and closing of a stoma * * * Bot. either of two specialized epidermal cells that flank the pore of a stoma and usually cause… … Useful english dictionary

guard cell — noun Date: 1875 one of the two crescent shaped epidermal cells that border and open and close a plant stoma … New Collegiate Dictionary

guard cell — Bot. either of two specialized epidermal cells that flank the pore of a stoma and usually cause it to open and close. [1870 75] * * * … Universalium

guard cell — noun Botany each of a pair of curved cells that surround a stoma … English new terms dictionary

guard cell — /ˈgad sɛl/ (say gahd sel) noun either of two specialised epidermal cells which flank the pore of a stoma and usually cause it to open and close … Australian English dictionary

guard cell — Specialized epidermal cells found in pairs around a stoma. Their function is to control the opening and closing of the stoma through changes in turgor … Glossary of Biotechnology